Update app.py

app.py

@@ -14,7 +14,7 @@ if not getattr(_gcu, "_patched_bool", False):
 APP_PASSWORD = os.getenv("APP_PASSWORD", "")  # 可在 Space Secrets 設定
 RUNPOD_TOKEN  = os.getenv("RUNPOD_BEARER_TOKEN")
 RUNPOD_ENDPOINT_ID = os.getenv("RUNPOD_ENDPOINT_ID")
-if END_ID:
+if RUNPOD_ENDPOINT_ID:
     URL = f"https://api.runpod.ai/v2/{RUNPOD_ENDPOINT_ID}/runsync"
 else:
     URL = None